Solder flux



Patented Apr. 16,1929

UNITED STATES JOHN D. RAYMOND, OF DETROIT, MICHIGAN.

VSOLDEB FLUX.

No Drawing.

My invention relates to a new and uselful improvement in a solder flux and has for lts object the provision of a solder flux which will be ctlicient'in use on soft and hard metals 5 such as zinc, tin and leach so as to obviate the necessity of two kinds of flux for soldering purposes.

Another object of the invention is the provision of a solder flux in the use of which corrosion. is avoided and which gives a bright, clear appearance to the soldered parts.

Another object of the invention is the provision of an easy and smooth flowing flux and one which will penetrate in the interstices of the workpiece operated upon so that a solid joint maybe effected. The invention consists of substantially the following ingredients, to wit:

. Parts.

Murial'ic or hydrochloric acid 3 ()leic acids; w 2 Powderedrosin s ;s 2' Sodium chloride 1 I have found that muri'atic acid is more desirable for use but the hydrochloric acld will serve the purpose and in the claims attached hereto the term muriaticacid where used is intended to indicate hydrochloric acid.-

In mixing the composition, the .rosin and salt are thoroughly mixed together and the muriatic or hydrochloric acid is then added and the whole thoroughly mixed. lVhen the salt and the rosin and the muriatic acid are 5 added together, the acid is thickened and is Application filed May 7,

I or a soft metal.

1928. Serial No. 275,978.

then prepared for mixing with the oleic acid which appears to emulsify the mixture. The combination of acids makes the flux operative for use on soft and hard metals and it has been experienced that a flux embodying only one of the acids can be used on solely a hard The presence of the oleic acid lends to the composition an oily characteristic thus rendering the flux efficient for use on soft metal and serving to conduct the solder into crevices between the joints to be soldered thus eliminating the formation of a bridge while the soldering operation is taking place. The acids also prevent corrosion and the presence of the salt renders the device most eflicient for securing the solder to the metal.

The flux thus made is cheap to manufacture and easily handled.

If desired, I a deodorant such as small amountofwintergneen may be added to the composition. I

While I have illustrated and described the preferred composition, I do not wish to limit myself to the exact details herein setoutbut desire to avail myself of such variations as come Within thescope of the appended claim.

What I claim is z,

A solderflux of the'class described, consisting of inuriatic acid 3 parts, oleic acid two parts, powdered rosin two parts, sodium chloride one part.

In testimony whereof I foregoing specification.

i have signed the 

